When you have the picture you want, take the URL, in this case :
"http://i1.tinypic.com/nx2e50.jpg" and surround it with [IMG] and [/IMG] so it looks like this.

[IMG]www.54jk.com[/IMG]

You will want to resize your photos first though, since they can be a pain for those with dial-up. I hope that helped.